<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1, user-scalable=no">
    <meta http-equiv="X-UA-Compatible" content="ie=edge,chrome=1">
    <meta name="author" content="杨宁争">
    <title></title>
 <style>
    *{
            box-sizing: border-box;
        }
        ul{
            padding: 0;
            margin: 0;
            list-style: none;
        }
    .box{
        width: 520px;
        height: 280px;
        margin: 300px auto;
        position: relative;
    }
    .img-list li{
        position: absolute;
        top: 0;
        left:0;
        display: none; 
    }
    .img-list li.current{
        display: block;
    } 
     .indicator{
        width: 100%;
        position: absolute;
        left:0;
        bottom: 20px;
        display: flex;
        justify-content: center;
        color: white;
    }
    .indicator li{
        width: 15px;
        height: 15px;
        background-color: #aaa;
        text-align: center;
        line-height: 15px;
        margin: 0 5px;
        border-radius: 50%;
        font-size: 14px;
    }
     .indicator li.active{
        background-color: red;
    } 
    .indicator li{
        cursor: pointer;
    }
     .img-click span{
        width: 30px;
        height: 40px;
        line-height: 40px;
        text-align: center;
        color: white;
        background-color: rgba(0, 0, 0, 0.1);
        position: absolute;
        top: calc(50% - 20px);
        display: none;
    }
    .img-click span:hover{
        background-color: purple;
        cursor: pointer;
    }
    .img-click .prev{
        left:0;
    }
    .img-click .next{
        right:0;
    }
    </style>
</head>
<body>
    <div class="box">
        <ul class="img-list">
            <li class="current"><a href="#"><img src="01.jpg" alt=""></a></li>
            <li><a href="#"><img src="02.jpg" alt=""></a></li>
            <li><a href="#"><img src="03.jpg" alt=""></a></li>
            <li><a href="#"><img src="04.jpg" alt=""></a></li>
            <li><a href="#"><img src="05.jpg" alt=""></a></li>
        </ul>
        <ul class="indicator">
            <li class="active">1</li>
            <li>2</li>
            <li>3</li>
            <li>4</li>
            <li>5</li>
        </ul>
        <div class="img-click">
            <span class="prev">&lt;</span>
            <span class="next">&gt;</span>
        </div>
    </div>
    <script src="./jquery.js"></script>
</body>
</html>
<script>

    var index = 0;
// 上一张
     function prevImg(){
            index = index==0 ? index=$('.img-list li').length -1 : index -1;
            Img();
        }
        // 下一张
        function nextImg(){
            index = index==$('.img-list li').length -1  ?  0 : index +1;
            Img();
        }

    var timer = setInterval(nextImg,1000);

    function Img(){
      
        if (index == 5) {
            // index = 0;
        }
        $('.img-list li').eq(index).addClass('current').siblings().removeClass('current');
        $('.indicator li').eq(index).addClass('active').siblings().removeClass('active');
    }

// 跟随指示灯
    $('.indicator li').hover(function(){
        clearInterval(timer);
      
            index = $(this).index();
            Img();
    },function(){
       
        timer = setInterval(nextImg,1000);
    });
    // 鼠标移入停止
    $('.box').mouseover(function(){
        clearInterval(timer);
            timer = null;
        $('.prev').show();
        $('.next').show();
    });
     $('.box').mouseout(function(){
       if(timer)return;
        timer = setInterval(nextImg,1000);
        $('.prev').hide();
        $('.next').hide();
    });
// 点击按钮
    $('.prev').click(function(){
            prevImg();
        });
       $('.next').click(function(){
            nextImg();
        });
</script>